Definition of Trafalgar Square from the Oxford Advanced Learner's Dictionary

 

Trafalgar Square

 
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a large square in central London, England. It was created in 1830-41 and named in honour of Lord Nelson's victory at the Battle of Trafalgar. In the centre of the square is Nelson's Column and on one side of it is the National Gallery. It is one of London's most popular tourist attractions. It is also a place where political protests and other demonstrations are often held and very large numbers of people gather there every year to celebrate New Year. see also St Martin-in-the-Fields